# George Mack

> George Mack is a British entrepreneur, writer, and marketing strategist best known for popularising the concept of 'High Agency' - the belief that you control your own destiny - and for building The Ad Professor into a platform reaching 300+ million people. Through his Substack newsletter (70,000+ subscribers), podcast appearances on Modern Wisdom and My First Million, and a Twitter following of 300,000+, Mack has become one of the most influential thinkers on mental models, decision-making, and entrepreneurship online. He co-founded the marketing agency Multiply, which has worked with startups backed by Stripe, Y Combinator, Sequoia, and LVMH, and is known for viral ideas like the 'Cocaine Phone vs. Kale Phone' two-device productivity protocol.

- **Role:** Founder at The Ad Professor / High Agency
- **Organizations:** The Ad Professor, Multiply, High Agency
- **Nationality:** British
- **Education:** Bachelor's Degree, University of York
- **Known for:** Built The Ad Professor to reach 300+ million people worldwide, Grew Twitter/X following to 300,000+ organically, Built High Agency Substack to 70,000+ subscribers

## Career timeline

- **2013** — Began studies at University of York
- **2016** — Graduated from University of York
- **2018** — Worked at Social Chain digital marketing agency
- **2019** — Co-founded Multiply marketing agency with Josh Kalms; first appearance on Modern Wisdom podcast discussing mental models
- **2021** — Launched The Ad Professor brand on Twitter/X, growing to #1 Advertising & PR creator on LinkedIn in the US
- **2022** — Launched personal newsletter and essay platform; The Ad Professor reaches 300+ million people
- **2023** — Viral 'Cocaine Phone vs. Kale Phone' concept covered by Fox News and Inc. Magazine
- **2024** — Celebrated 30th birthday in Miami; continued podcast appearances on Modern Wisdom EP. 801 and My First Million EP. 703
- **2025** — Launched High Agency Substack, reaching 70,000+ subscribers; appeared on Modern Wisdom EP. 919

## Achievements

- Built The Ad Professor to reach 300+ million people worldwide
- Grew Twitter/X following to 300,000+ organically
- Built High Agency Substack to 70,000+ subscribers
- Ranked #1 Advertising & PR creator on LinkedIn in the US (Top 1%)
- The Ad Professor newsletter reached 50,000+ subscribers
- Co-founded Multiply, working with startups backed by Stripe, Y Combinator, Sequoia, and LVMH
- Multiple appearances on Modern Wisdom (one of the top podcasts globally)
- Featured on My First Million podcast
- Coined the viral 'Cocaine Phone vs. Kale Phone' productivity protocol covered by Fox News and Inc. Magazine
- Popularised the concept of 'High Agency' as a defining personality trait for the 21st century

## Latest updates

- **2025-03** — Appeared on Modern Wisdom EP. 919: 'How To Take Control of Your Own Destiny'
- **2025-01** — High Agency Substack surpassed 70,000 subscribers
- **2024-06** — Appeared on Modern Wisdom EP. 801: '13 Life-Changing Ideas You've Never Heard Of'
- **2024-06** — Celebrated 30th birthday in Miami with Chris Williamson
- **2024-01** — Appeared on My First Million EP. 703: 'Agency - The Most Valuable Skill for Any Founder'

## Links

- Website: https://www.george-mack.com
- LinkedIn: https://www.linkedin.com/in/george-mack
- Twitter/X: https://x.com/george__mack
- YouTube: https://www.youtube.com/channel/UCEL3mpCvzdgEIjp0Pe4KWRA
- Instagram: https://www.instagram.com/george__mack/

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Profile page: https://yespress.io/george-mack
Published by YesPress — https://yespress.io
Last updated: 2026-04-28